The plug-in scaling resistors provide a simple method of coping with different voltage input. The resistance is not critical.
The data output from the power and distribution interface have 47 ohm resistors in each output line. They can not burn
out even if short circuited, but they will burn out, and the output chips be blown if a high voltage is applied to the output
lines. This is mentioned because there have been occasions when high voltage has been applied to data outputs, and
the warranty does not cover this. Even if it happens it’s easy to fix because the output chips SN74HCT240N and the 47R
1/8
th
watt resistors are easily available worldwide.
The data output from module 1 is prefaced with “#” to indicate the data is to be used by module 2 rather than being
passed on. The data output from module 2 does not send that character, unless it is on the 1:1 mode. The output data is
carefully contrived to allow a fast update with full information on both processors. If a user needs to get a faster output of
$HEHDT that is available from the KW991 or KW950E repeaters.
Andrew Fairgrieve
Summary of Contents for KW910-X2
Page 1: ...FIRST DRAFT DUAL RESOLVER TO DIGITAL INTERFACE KW910 X2 ADITEL MARINE ELECTRONICS ...
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